Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
thanh dung » thanh duong, thanh tung, thanh hung
hieu manh » chieu xanh, dieu hanh, hien hanh
manh toan » thanh toan, anh tuan, tinh toan
dung cua » dung luan, dung cho
ban cong » bang cong, van cong, phan cong
dan than » dan chan, ban than, van than

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((hieu manh) OR (hieu nganh)) - thanh dung cua ban cong ((dan than) or (manh toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((hieu manh) OR (hieu nganh)) - thanh dung cua ban cong ((dan than) OR (manh toan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((hieu manh) OR (hieu nganh)) - thanh dung cua ban cong ((dan than) or (manh toan)) tap".
• Adding a wildcard symbol may retrieve word variants: toc ((hieu manh) OR (hieu nganh)) - thanh dung cua ban cong ((dan than) or (manh toan)) tap*.